TGK SPECIAL STEEL PVT. LTD. - HANDBOOK

The Name You Can Trust www.tgkssl.com - 31 - Descriptions and data in the file are typical cases. We will not make guarantee for them. Besides, we reserve the final right to interpret improvement in materials, quality and/or performance. Steel grade (M52S) Smelting method: 15T intermediate frequency furnace +LF+VD+ESR Main characteristics: High-sulfur high-speed steel, extremely high material surface fineness, convenient for cutting and high machinable property. Major applications:  Applicable to pagoda drills (stepped drills) and other drilling bit products. Chemical constituent %: C Si Mn W Cr Mo V Co P S 0.90 0.29 0.30 1.12 3.97 4.27 1.83 0.027 ≤0.028 0.10 Physical property: Room temperature density (Kg/m 3 ) Specific heat of room temperature (J/Kg·K) 20ºC thermal conductivity (W/m•K) Elastic modulus (N/mm 2 ) Linear expansivity (×10 -6 K) 20~200ºC 20~400ºC 8.01 460 19.00 217,000 10.8 11.6 Ultrasonic flaw detection: As per SEP1921 E/e or customer requirements. Purity: A (Sulfide) B (Oxide) C (Silicate) D (Cyclic oxide) Fine Coarse Fine Coarse Fine Coarse Fine Coarse ---- --- 0.5 0.5 0.5 0.5 1.0 0.5 Delivery state: (1) Delivery under balling annealing state, delivery hardness ≤269HB. Supply specification: Product name Specification Round bar Ø13~120mm HIGH SPEED STEEL